The '''Ultima Founding''' is the most recent Space Marine founding, created at the direct order of [[Roboute Guilliman]] following his resurrection shortly after the [[Thirteenth Black Crusade]]. This Founding is one of the largest and most significant, as it consists mainly of the new [[Primaris Space Marines]]. Moreover, the Primaris Marines from the Ultima Founding will be used to refresh and reinforce depleted chapter's chapters in addition to creating new ones. The Ultima Founding is at the forefront of Guilliman's [[Indomitus Crusade]].{{Fn|24}}